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Modeling Passive Scalar Dynamics in Wall-Bounded Turbulence using Resolvent Analysis

Dawson, Scott T. M. and Saxton-Fox, Theresa and McKeon, Beverley J. (2018) Modeling Passive Scalar Dynamics in Wall-Bounded Turbulence using Resolvent Analysis. In: 2018 Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2018-4042. ISBN 978-1-62410-553-1. https://resolver.caltech.edu/CaltechAUTHORS:20190816-111358078

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Abstract

This work develops a framework for studying the behavior of a passive scalar field in incompressible wall-bounded turbulence using ·the resolvent operator. This approach expresses the stale of the system as the result of applying a linear (resolvent) operator to the nonlinear terms in the governing Navier-Stokes equations. By augmenting the system with a passive scalar equation, this formulation is used to study the relationship between velocity and scalar fluctuations. Additional insight into the mechanisms responsible for driving scalar fluctuations is attained by considering the resolvent form of the passive scalar equation in isolation from the momentum equations. We demonstrate that the passive scalar resolvent operator admits rescaling properties that relates the behavior or scalar fields with different diffusivities, and investigate the ability of this modeling framework to predict statistical properties of the fluctuating scalar field.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2018-4042DOIArticle
ORCID:
AuthorORCID
Dawson, Scott T. M.0000-0002-0020-2097
Saxton-Fox, Theresa0000-0003-1328-4148
McKeon, Beverley J.0000-0003-4220-1583
Additional Information:© 2018 American Institute of Aeronautics and Astronautics. Published Online: 24 Jun 2018.
Group:GALCIT
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2018-4042
Record Number:CaltechAUTHORS:20190816-111358078
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190816-111358078
Official Citation:Modeling Passive Scalar Dynamics in Wall-Bounded Turbulence using Resolvent Analysis. Scott T. Dawson, Theresa Saxton-Fox, and Beverley J. McKeon. 2018 Fluid Dynamics Conference. June. doi: 10.2514/6.2018-4042
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97952
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:16 Aug 2019 20:30
Last Modified:03 Oct 2019 21:36

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